<template>

  <div class="tab-bar-item" @click="itemClick">
    <div v-if="!isActive"><slot  name="item-icon"></slot></div>
    <div v-else><slot  name="item-icon-active"></slot></div>
    <div :style="activeStyle"><slot name="item-text"></slot></div>
  </div>
</template>

<script>
export default {
  name: "TabBarItem",
  props: {
    path: String,
    activeColor:{
      type: String,
      //默认值，默认是红色的，如果有传值过来就将其覆盖
      default: 'pink'
    }
  },
  data() {
    return{
      // isActive: true
    }
  },
  computed:{
    isActive(){
      //indexOf == -1 没找到这个字符串  ！==-1表示找到字符串了
      return this.$route.path.indexOf(this.path) !== -1
    },
    activeStyle(){
      //如果处于活跃状态，给他传的color，否则给他空的值
      return this.isActive ? {color: this.activeColor} : {}
    }
  },
  methods: {
    itemClick(){
      this.$router.push(this.path)
    }
  }
}
</script>

<style scoped>


#tab-bar{
  display: flex;
  background: #f6f6f6;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  box-shadow: 0 -3px 1px rgba(100,100,100,0.1);
}
.tab-bar-item {
  flex: 1;
  text-align: center;
  height: 49px;
  font-size: 14px;
}
.tab-bar-item img{
  width: 24px;
  height: 24px;
  margin-top: 3px;
  vertical-align: middle;
}

</style>
